package collection;

import java.util.ArrayList;
import java.util.List;

public class ListDemo2 {
    public static void main(String[] args) {
        // add(),remove(),
        List<String> list=new ArrayList<>();
        list.add("one");
        list.add("two");
        list.add("three");
        list.add("four");
        list.add("five");
        System.out.println("list:"+list);
        System.out.println("-------------");
        //add
        list.add(3,"six");
        System.out.println("list:"+list);
        list.add(6,"seven");
        //若add的下标在最后一个元素的下一个位置，相当于追加操作
        System.out.println("list:"+list);

        //remove
        list.remove(2);
        System.out.println("list:"+list);
        String s=list.remove(2);
        System.out.println("s:"+s);
        System.out.println("list:"+list);
    }
}
